| Singlehanded Sailing Society | Academic & Science |
| Society for Slovene Studies | Academic & Science |
| Southern Sociological Society | Academic & Science |
| Shevchenko Scientific Society | Academic & Science |
| Наукове Товариство ім. Шевченка | Academic & Science |
| Naukove Tovaristvo ìm. Ševčenka | Academic & Science |
| Swiss Systematic Society | Academic & Science |
| Swiss Systematics Society | Academic & Science |
| Secret Supernatural Society | Academic & Science |
| Special Snowflake Society | Academic & Science |
| Secret Sandwich Society | Academic & Science |
| Student Support Services | Academic & Science |
| Singapore Students Society | Academic & Science |
| Student Satisfaction Survey | Academic & Science |
| Student Self Service | Academic & Science |
| Student Self Serve | Academic & Science |
| Suction Specific Speed | Academic & Science |
| Shoring and Scaffolding System | Academic & Science |
| Self-Supporting Structure | Academic & Science |
| Solar Single Scattering | Academic & Science |
| Social Studies of Science | Academic & Science |
| School of Social Science | Academic & Science |
| Soil System Sciences | Academic & Science |
| Surface Science Spectra | Academic & Science |
| Single Source Selection | Accounts and Finance |
| Siassi | Airport Code |
| Securities Settlement System | Banking |
| Self-Sustainable Solution | Business |
| Sharp Shooter Supply | Business |
| Summit Settlement Services | Business |
| Superstore Southwest Supply | Business |
| Spy Supply Store | Business |
| Software Subscription Services | Business |
| Standard Supply Service | Business |
| Single Source Service | Business |
| Sovran Self Storage, Inc. | Business |
| Static Spherically Symmetric | Chemistry |
| Sacred Songs and Solos | Community |
| Super Special Seniors | Community |
| Seaside Startup Summit | Community |
| School and Student Services | Community |
| Student Special Services | Community |
| School Security System | Community |
| Smoking, Self-harm, Stealing | Community |
| Silent Steel Screenshot | Community |
| Studio Sound Simulator | Community |
| Sweet Spot Select | Community |
| Sri Sathya Sai | Community |
| Sanitas, Sanctitas, and Scientia | Community |
| Senior Secondary School | Community |
| Sainik School Satara | Community |
| School of Social Sciences | Community |
| Scouting Seamanship and Service | Community |
| System Surround Speaker | Computer Hardware |
| Super Stereo Soundboard | Computer Hardware |
| Simple System Security | Computing |
| Sore Sour Soul | Computing |
| Shamir's Secret Sharing | Computing |
| Self Synchronizing Sober | Computing |
| Subsystem Specification | Computing |
| Surround Sound Speakers | Computing |
| Swift Servo System | Computing |
| Service Session Socket | Computing |
| Subscriber Service Switch | Computing |
| Software Support Service | Computing |
| Server Side Script | Computing |
| Shadow Security Scanner | Computing |
| Shared System Suite | Computing |
| Server Side Software | Computing |
| Storage Serviceability Standards | Computing |
| Switching Subsystem | Computing |
| Shared Support Service | Computing |
| Symantec Security Services | Computing |
| Sprint System Selection | Computing |
| Self Sustaining System | Computing |
| Sun Streaming Server | Computing |
| StarSharks (SSS) | Cryptocurrency |
| Simple Software Solutions | Cryptocurrency |
| Solid State Simulation | Electronics |
| Sinusoidal Steady State | Electronics |
| Stable Steady State | Electronics |
| Selective Smoothness Syndrome | Electronics |
| Stereo Simulator System | Electronics |
| Strategic Sealift Ship | General |
| Sae-a Student Seminars | General |
| Siam Subaru Society | General |
| Solid Silver Spirit of Ecstasy | General |
| Suzuki Safety Support | General |
| Sydney Showground Speedway | General |
| Speedcar Super Series | General |
| Seats Static Strength | General |
| Self-Sacrificing Style | General |
| Steel String Singer | General |
| Supersaturated Solid Solution | General |
| Sera Senshi Sanjo | General |
| Soft State Store | General |
| Sunny Sunny Sunny | General |
| Short, Sour, and Stale | General |
| Sardines, Salad, and Suds | General |
| Soup, Salad, and Smoothies | General |
| Shoe States Of Saturn | General |
| Super Secret Something | General |
| Sassy, Silly, and Sweet | General |
| Serious Sorry Sap | General |
| Super Stupid System | General |
| Seasonal Secret Sisters | General |
| Super Silly Slow | General |
| Sergeant Schutz Staffel | General |
| Stupid Security Service | General |
| Society of Sober Sailors | General |
| Sun, Sand, Surfers | General |
| Stanley Standard Siegley | General |
| Super Saiyan Son | General |
| Swarm Sugarscape A Swarm | General |
| Sunshine State Standards | General |
| Semi Structured Syntax | General |
| So Solid Soldier | General |
| Shazzas Slippery Slide | General |
| Speed Steering And Stability | General |
| Sigma Star Saga | General |
| Sensors and Sensing Systems | General |
| Sensors and Sensing System | General |
| Sovran Self Storage | General |
| Slope Soaring Simulator | General |
| S for Subsurface Scattering | General |
| Start of Speed Section | General |
| Super Sump Saver | General |
| Sound Studio and Stage | General |
| Short Sharp Shock | General |
| Simple Snack Sympathetic | General |
| Silky Smooth Skin | General |
| Sport Sequential Shiftmatic | General |
| Self Stabilizing Systems | General |
| Super Special Series | General |
| Salli S Swindell | General |
| Speed Sensitive Steering | General |
| Steel Smart System | General |
| Star Safety System | General |
| Scholastic Surf Series | General |
| Super Strut Suspension | General |
| System Support Services | General |
| Sequential Sport Shift | General |
| Supplement Steady State | General |
| Structural Straightening Steel | General |
| Speed Sensitive Suspension | General |
| Super Street Shootout | General |
| Super Street Series | General |
| Super Special for Street | General |
| Super Street Sports | General |
| Software Service Station | General |
| Start Stop System | General |
| Silver State Stangs | General |
| Service Suspension System | General |
| Supersonic Suspension System | General |
| Servizio Segnalazioni Stradali | General |
| Suzuki Swift Sport | General |
| Sighkotik Softtail Society | General |
| Special Support Services | General |
| Simple Snack Sympathique | General |
| Shift Shape and Sustain | General |
| Salary Saving Scheme | General |
| Sigue Sigue Sputnik | General |
| Security Savings Systems | General |
| Soup Stew Suprise | General |
| Street Style Store | General |
| Saturday Skills and Scrimmages | General |
| Shinda Sekai Sensen | General |
| Socket Set Screw | General |
| Symmetric Storage Systems | General |
| Syndromic Surveillance System | General |
| System Support Specialist | General |
| Subjective Social Status | General |
| Stanford Sleepiness Scale | General |
| Sistah Standing Strong | General |
| Secret Strat Sauce | General |
| Suzuki Sumiden Stainless | General |
| Sugoku Suteki Shinjirarenai | General |
| Single Shared System | General |
| Sea Surface Salinity | General |
| Sycamore Seed Signals | General |
| Solid State Simulations | General |
| Simon Says Stamp | General |
| Selective Service System | Governmental |
| Social Security Sequence | Governmental |
| Special Scientific Study | Governmental |
| Social Security System | Governmental |
| Short Straight Section | Governmental |
| Super Sports Sedan | Governmental |
| Seldom Start System | Governmental |
| Security and Safety Service | Governmental |
| Short Sharp Sweet | Governmental |
| Search Segregate Silence | Governmental |
| Special Service Staff | Governmental |
| Sniper Sub-Sonic | Governmental |
| Service Support Standard | Governmental |
| State Security Service | Governmental |
| Su Seguro Servidor | International |
| Secret Stalking Society | Internet |
| Steady State Stability | Internet |
| State Space Search | Maths |
| Side Side Side | Maths |
| Scalded Skin Syndrome | Medical |
| Surgical Stainless Steel | Medical |
| Sick Sinus Syndrome | Medical |
| Super Sunday Session | Messaging |
| Self-stecker Selection | Military and Defence |
| Shoot, Shovel, and Shut The Door | Military and Defence |
| Singing Short Sword | Military and Defence |
| Sub Sonic Sniper | Military and Defence |
| Sos for A Submarine Attack | Military and Defence |
| Shelter Subsystem | Military and Defence |
| Storage Serviceability Standard | Military and Defence |
| Software Segment Specification | Military and Defence |
| Senior Span Segment | Military and Defence |
| Scout Sniper School | Military and Defence |
| Server Side Scrolling | Networking |
| Symmetric Steady State | Physics Related |
| Sub Surface Scattering | Physics Related |
| Sub-surface Scatering | Physics Related |
| Siassi, Papua New Guinea | Regional |
| Symbol System Satisfiability | Softwares |
| Software Subscription Service | Softwares |
| Software Scanning Services | Softwares |
| Server Software and Support | Softwares |
| Signwriting Symbol Sequence | Softwares |
| System Segment Specification | Softwares |
| System/subsystem Specification | Softwares |
| Stochastic Structure Search | Softwares |
| Serious Statistical Software (company) | Softwares |
| Simple Scheduler Sol | Softwares |
| Sound Suppression System | Space Science |
| Space Shuttle System | Space Science |
| Stage Separation System | Space Science |
| Station Set Specification | Space Science |
| Sub-system Segment | Space Science |
| Standard Scratch Score | Sports |
| Sequential Sports Shift | Sports |
| Sports Sequential Shift | Sports |
| Sunday Slalom Sessions | Sports |
| Staples Sports Scoreboard | Sports |
| Super Sport Sedan | Sports |
